Trying to install drum plug in, help!

I am trying to install a drum plugin- as the subject of this suggests.
The tutorial says that it can be used on all three OS-windows, linux and mac.
It gave the ways to go about this with windows and linux but not mac
It seems like an easy process, but I’m new to mac.
Many thanks- here is the link:

Please read the pink panel at the top of this page - it always helps to give us that information.

Audio Selection Sequencer 2 is here: .

Installation instructions for Nyquist plugins are here:

In other words, extract the file “seq2.ny” from (double-click the downloaded zip file it it doesn’t extract automatically). Then put the extracted “seq2.ny” file in the “Plug-ins” folder where Audacity is installed and restart Audacity.